/* * dyngen helpers * * Copyright (c) 2003 Fabrice Bellard * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ int __op_param1, __op_param2, __op_param3; #if defined(__sparc__) || defined(__arm__) void __op_gen_label1(){} void __op_gen_label2(){} void __op_gen_label3(){} #else int __op_gen_label1, __op_gen_label2, __op_gen_label3; #endif int __op_jmp0, __op_jmp1, __op_jmp2, __op_jmp3; #if defined(__i386__) || defined(__x86_64__) || defined(__s390__) static inline void flush_icache_range(unsigned long start, unsigned long stop) { } #elif defined(__ia64__) static inline void flush_icache_range(unsigned long start, unsigned long stop) { while (start < stop) { asm volatile ("fc %0" :: "r"(start)); start += 32; } asm volatile (";;sync.i;;srlz.i;;"); } #elif defined(__powerpc__) #define MIN_CACHE_LINE_SIZE 8 /* conservative value */ static void inline flush_icache_range(unsigned long start, unsigned long stop) { unsigned long p; start &= ~(MIN_CACHE_LINE_SIZE - 1); stop = (stop + MIN_CACHE_LINE_SIZE - 1) & ~(MIN_CACHE_LINE_SIZE - 1); for (p = start; p < stop; p += MIN_CACHE_LINE_SIZE) { asm volatile ("dcbst 0,%0" : : "r"(p) : "memory"); } asm volatile ("sync" : : : "memory"); for (p = start; p < stop; p += MIN_CACHE_LINE_SIZE) { asm volatile ("icbi 0,%0" : : "r"(p) : "memory"); } asm volatile ("sync" : : : "memory"); asm volatile ("isync" : : : "memory"); } #elif defined(__alpha__) static inline void flush_icache_range(unsigned long start, unsigned long stop) { asm ("imb"); } #elif defined(__sparc__) static void inline flush_icache_range(unsigned long start, unsigned long stop) { unsigned long p; p = start & ~(8UL - 1UL); stop = (stop + (8UL - 1UL)) & ~(8UL - 1UL); for (; p < stop; p += 8) __asm__ __volatile__("flush\t%0" : : "r" (p)); } #elif defined(__arm__) static inline void flush_icache_range(unsigned long start, unsigned long stop) { register unsigned long _beg __asm ("a1") = start; register unsigned long _end __asm ("a2") = stop; register unsigned long _flg __asm ("a3") = 0; __asm __volatile__ ("swi 0x9f0002" : : "r" (_beg), "r" (_end), "r" (_flg)); } #elif defined(__mc68000) # include <asm/cachectl.h> static inline void flush_icache_range(unsigned long start, unsigned long stop) { cacheflush(start,FLUSH_SCOPE_LINE,FLUSH_CACHE_BOTH,stop-start+16); } #elif defined(__mips__) #include <sys/cachectl.h> static inline void flush_icache_range(unsigned long start, unsigned long stop) { _flush_cache ((void *)start, stop - start, BCACHE); } #else #error unsupported CPU #endif #ifdef __alpha__ register int gp asm("$29"); static inline void immediate_ldah(void *p, int val) { uint32_t *dest = p; long high = ((val >> 16) + ((val >> 15) & 1)) & 0xffff; *dest &= ~0xffff; *dest |= high; *dest |= 31 << 16; } static inline void immediate_lda(void *dest, int val) { *(uint16_t *) dest = val; } void fix_bsr(void *p, int offset) { uint32_t *dest = p; *dest &= ~((1 << 21) - 1); *dest |= (offset >> 2) & ((1 << 21) - 1); } #endif /* __alpha__ */ #ifdef __arm__ #define ARM_LDR_TABLE_SIZE 1024 typedef struct LDREntry { uint8_t *ptr; uint32_t *data_ptr; unsigned type:2; } LDREntry; static LDREntry arm_ldr_table[1024]; static uint32_t arm_data_table[ARM_LDR_TABLE_SIZE]; extern char exec_loop; static inline void arm_reloc_pc24(uint32_t *ptr, uint32_t insn, int val) { *ptr = (insn & ~0xffffff) | ((insn + ((val - (int)ptr) >> 2)) & 0xffffff); } static uint8_t *arm_flush_ldr(uint8_t *gen_code_ptr, LDREntry *ldr_start, LDREntry *ldr_end, uint32_t *data_start, uint32_t *data_end, int gen_jmp) { LDREntry *le; uint32_t *ptr; int offset, data_size, target; uint8_t *data_ptr; uint32_t insn; uint32_t mask; data_size = (data_end - data_start) << 2; if (gen_jmp) { /* generate branch to skip the data */ if (data_size == 0) return gen_code_ptr; target = (long)gen_code_ptr + data_size + 4; arm_reloc_pc24((uint32_t *)gen_code_ptr, 0xeafffffe, target); gen_code_ptr += 4; } /* copy the data */ data_ptr = gen_code_ptr; memcpy(gen_code_ptr, data_start, data_size); gen_code_ptr += data_size; /* patch the ldr to point to the data */ for(le = ldr_start; le < ldr_end; le++) { ptr = (uint32_t *)le->ptr; offset = ((unsigned long)(le->data_ptr) - (unsigned long)data_start) + (unsigned long)data_ptr - (unsigned long)ptr - 8; if (offset < 0) { fprintf(stderr, "Negative constant pool offset\n"); abort(); } switch (le->type) { case 0: /* ldr */ mask = ~0x00800fff; if (offset >= 4096) { fprintf(stderr, "Bad ldr offset\n"); abort(); } break; case 1: /* ldc */ mask = ~0x008000ff; if (offset >= 1024 ) { fprintf(stderr, "Bad ldc offset\n"); abort(); } break; case 2: /* add */ mask = ~0xfff; if (offset >= 1024 ) { fprintf(stderr, "Bad add offset\n"); abort(); } break; default: fprintf(stderr, "Bad pc relative fixup\n"); abort(); } insn = *ptr & mask; switch (le->type) { case 0: /* ldr */ insn |= offset | 0x00800000; break; case 1: /* ldc */ insn |= (offset >> 2) | 0x00800000; break; case 2: /* add */ insn |= (offset >> 2) | 0xf00; break; } *ptr = insn; } return gen_code_ptr; } #endif /* __arm__ */ #ifdef __ia64 /* Patch instruction with "val" where "mask" has 1 bits. */ static inline void ia64_patch (uint64_t insn_addr, uint64_t mask, uint64_t val) { uint64_t m0, m1, v0, v1, b0, b1, *b = (uint64_t *) (insn_addr & -16); # define insn_mask ((1UL << 41) - 1) unsigned long shift; b0 = b[0]; b1 = b[1]; shift = 5 + 41 * (insn_addr % 16); /* 5 template, 3 x 41-bit insns */ if (shift >= 64) { m1 = mask << (shift - 64); v1 = val << (shift - 64); } else { m0 = mask << shift; m1 = mask >> (64 - shift); v0 = val << shift; v1 = val >> (64 - shift); b[0] = (b0 & ~m0) | (v0 & m0); } b[1] = (b1 & ~m1) | (v1 & m1); } static inline void ia64_patch_imm60 (uint64_t insn_addr, uint64_t val) { ia64_patch(insn_addr, 0x011ffffe000UL, ( ((val & 0x0800000000000000UL) >> 23) /* bit 59 -> 36 */ | ((val & 0x00000000000fffffUL) << 13) /* bit 0 -> 13 */)); ia64_patch(insn_addr - 1, 0x1fffffffffcUL, val >> 18); } static inline void ia64_imm64 (void *insn, uint64_t val) { /* Ignore the slot number of the relocation; GCC and Intel toolchains differed for some time on whether IMM64 relocs are against slot 1 (Intel) or slot 2 (GCC). */ uint64_t insn_addr = (uint64_t) insn & ~3UL; ia64_patch(insn_addr + 2, 0x01fffefe000UL, ( ((val & 0x8000000000000000UL) >> 27) /* bit 63 -> 36 */ | ((val & 0x0000000000200000UL) << 0) /* bit 21 -> 21 */ | ((val & 0x00000000001f0000UL) << 6) /* bit 16 -> 22 */ | ((val & 0x000000000000ff80UL) << 20) /* bit 7 -> 27 */ | ((val & 0x000000000000007fUL) << 13) /* bit 0 -> 13 */) ); ia64_patch(insn_addr + 1, 0x1ffffffffffUL, val >> 22); } static inline void ia64_imm60b (void *insn, uint64_t val) { /* Ignore the slot number of the relocation; GCC and Intel toolchains differed for some time on whether IMM64 relocs are against slot 1 (Intel) or slot 2 (GCC). */ uint64_t insn_addr = (uint64_t) insn & ~3UL; if (val + ((uint64_t) 1 << 59) >= (1UL << 60)) fprintf(stderr, "%s: value %ld out of IMM60 range\n", __FUNCTION__, (int64_t) val); ia64_patch_imm60(insn_addr + 2, val); } static inline void ia64_imm22 (void *insn, uint64_t val) { if (val + (1 << 21) >= (1 << 22)) fprintf(stderr, "%s: value %li out of IMM22 range\n", __FUNCTION__, (int64_t)val); ia64_patch((uint64_t) insn, 0x01fffcfe000UL, ( ((val & 0x200000UL) << 15) /* bit 21 -> 36 */ | ((val & 0x1f0000UL) << 6) /* bit 16 -> 22 */ | ((val & 0x00ff80UL) << 20) /* bit 7 -> 27 */ | ((val & 0x00007fUL) << 13) /* bit 0 -> 13 */)); } /* Like ia64_imm22(), but also clear bits 20-21. For addl, this has the effect of turning "addl rX=imm22,rY" into "addl rX=imm22,r0". */ static inline void ia64_imm22_r0 (void *insn, uint64_t val) { if (val + (1 << 21) >= (1 << 22)) fprintf(stderr, "%s: value %li out of IMM22 range\n", __FUNCTION__, (int64_t)val); ia64_patch((uint64_t) insn, 0x01fffcfe000UL | (0x3UL << 20), ( ((val & 0x200000UL) << 15) /* bit 21 -> 36 */ | ((val & 0x1f0000UL) << 6) /* bit 16 -> 22 */ | ((val & 0x00ff80UL) << 20) /* bit 7 -> 27 */ | ((val & 0x00007fUL) << 13) /* bit 0 -> 13 */)); } static inline void ia64_imm21b (void *insn, uint64_t val) { if (val + (1 << 20) >= (1 << 21)) fprintf(stderr, "%s: value %li out of IMM21b range\n", __FUNCTION__, (int64_t)val); ia64_patch((uint64_t) insn, 0x11ffffe000UL, ( ((val & 0x100000UL) << 16) /* bit 20 -> 36 */ | ((val & 0x0fffffUL) << 13) /* bit 0 -> 13 */)); } static inline void ia64_nop_b (void *insn) { ia64_patch((uint64_t) insn, (1UL << 41) - 1, 2UL << 37); } static inline void ia64_ldxmov(void *insn, uint64_t val) { if (val + (1 << 21) < (1 << 22)) ia64_patch((uint64_t) insn, 0x1fff80fe000UL, 8UL << 37); } static inline int ia64_patch_ltoff(void *insn, uint64_t val, int relaxable) { if (relaxable && (val + (1 << 21) < (1 << 22))) { ia64_imm22_r0(insn, val); return 0; } return 1; } struct ia64_fixup { struct ia64_fixup *next; void *addr; /* address that needs to be patched */ long value; }; #define IA64_PLT(insn, plt_index) \ do { \ struct ia64_fixup *fixup = alloca(sizeof(*fixup)); \ fixup->next = plt_fixes; \ plt_fixes = fixup; \ fixup->addr = (insn); \ fixup->value = (plt_index); \ plt_offset[(plt_index)] = 1; \ } while (0) #define IA64_LTOFF(insn, val, relaxable) \ do { \ if (ia64_patch_ltoff(insn, val, relaxable)) { \ struct ia64_fixup *fixup = alloca(sizeof(*fixup)); \ fixup->next = ltoff_fixes; \ ltoff_fixes = fixup; \ fixup->addr = (insn); \ fixup->value = (val); \ } \ } while (0) static inline void ia64_apply_fixes (uint8_t **gen_code_pp, struct ia64_fixup *ltoff_fixes, uint64_t gp, struct ia64_fixup *plt_fixes, int num_plts, unsigned long *plt_target, unsigned int *plt_offset) { static const uint8_t plt_bundle[] = { 0x04, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, /* nop 0; movl r1=GP */ 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x60, 0x05, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, /* nop 0; brl IP */ 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xc0 }; uint8_t *gen_code_ptr = *gen_code_pp, *plt_start, *got_start; uint64_t *vp; struct ia64_fixup *fixup; unsigned int offset = 0; struct fdesc { long ip; long gp; } *fdesc; int i; if (plt_fixes) { plt_start = gen_code_ptr; for (i = 0; i < num_plts; ++i) { if (plt_offset[i]) { plt_offset[i] = offset; offset += sizeof(plt_bundle); fdesc = (struct fdesc *) plt_target[i]; memcpy(gen_code_ptr, plt_bundle, sizeof(plt_bundle)); ia64_imm64 (gen_code_ptr + 0x02, fdesc->gp); ia64_imm60b(gen_code_ptr + 0x12, (fdesc->ip - (long) (gen_code_ptr + 0x10)) >> 4); gen_code_ptr += sizeof(plt_bundle); } } for (fixup = plt_fixes; fixup; fixup = fixup->next) ia64_imm21b(fixup->addr, ((long) plt_start + plt_offset[fixup->value] - ((long) fixup->addr & ~0xf)) >> 4); } got_start = gen_code_ptr; /* First, create the GOT: */ for (fixup = ltoff_fixes; fixup; fixup = fixup->next) { /* first check if we already have this value in the GOT: */ for (vp = (uint64_t *) got_start; vp < (uint64_t *) gen_code_ptr; ++vp) if (*vp == fixup->value) break; if (vp == (uint64_t *) gen_code_ptr) { /* Nope, we need to put the value in the GOT: */ *vp = fixup->value; gen_code_ptr += 8; } ia64_imm22(fixup->addr, (long) vp - gp); } /* Keep code ptr aligned. */ if ((long) gen_code_ptr & 15) gen_code_ptr += 8; *gen_code_pp = gen_code_ptr; } #endif